Pump



1934' w. A. SHALLENBERG 1,976,464

PUMP

Filed April 1, 1955 FIG. 1 /oo Patented Oct. 9, 1934 UNITED STATESPATENT OFFICE PUMP tion of Ohio Application April 1, 1933, Serial No.663,942 8 Claims. (Cl. 103228) This invention relates to a reciprocatingpump having suction and discharge valves, and is particularly concernedwith the feature of the valves. More particularly the invention providesa removable valve seat, a cooperating valve and a device which performsthe double function of holding the valve seat in place and guiding thevalve with reference thereto. The same device may also hold at propertension 9. spring, which seats the valve.

My valve construction, while adapted for a variety of pumps, may beadvantageously used, for example, with a pump having an open-endedcylinder in a pump chamber, one wall of which carries suction anddischarge valves, so that as the piston reciprocates in the cylinder,the latter receives liquid through the suction valve and discharges itthrough the discharge valve. When so embodied, the pump chamber wall mayconveniently comprise a horizontal deck carrying a suction valve on oneside of it and a discharge valve on the other, respectively controllingsuction and discharge chambers beyond the deck, and in such case aremovable cover for these chambers may readily provide for theinstallation or removal of the valves.

The invention is illustrated herein in an embodiment which has a doubleacting piston and cylinder located horizontally in a pump chambersurmounted by a valve deck. Above this deck the space is divided toprovide a suction chamber and a discharge chamber, each of which has twovalves, and below the deck the space is divided transversely of theupper division to associate one suction valve and one discharge valvewith one end of the cylinder, and the other suction valve and dischargevalve with the other end of the cylinder. When so embodied, theremovable cover for the respective chambers above the deck may alsoIumish the desired air chamber for the discharge side of the pump.

In the drawing, Fig. 1 is a vertical section through a double-actingreciprocating pump, of the type last referred to, having a pair of mysuction valves and a pair of my discharge valves, the plane of thesection being taken at right angles to the axis of the cylinder andthrough the axis of one suction valve and one discharge valve; Fig. 2 isa horizontal section through the suction and discharge chambers abovethe valves, as indicated by the line 2-2 on Fig. 1; Fig. 3 is a verticalsection at right angles to Fig. 1, as indicated by the line 3-3 on Fig.2; Fig. 4 is a sectional elevation of one of the discharge valves, itsseat, guide and spring; Fig. 5 is a corresponding view of one of thesuction valves with its seat, guide and spring.

I will first describe the general characteristics of the pump shown inFigs. 1, 2, and 3, in order that the mounting and operation of my valvesmay be best understood, after which the valve construction will bespecifically described. In Figs. 1, 2 and 3, 10 indicates a casingproviding the pump chamber and the lower portion of the suction anddischarge chambers. The lowermost portion of this casing. is formed intoa horizontal cylinder 11, open at opposite ends, leaving spaces 12 and13 within the casing beyond the cylinder ends. Extending transversely ofthe cylinder is a partition 14, dividing the pump chamber into twocompartments connecting respectively with the opposite ends of thecylinder. Extending across the casing 10 and connected with thepartition 14 is a horizontal diaphragm or deck 15, and above this is apartition 16 at right angles to the partition 14 and providing thesuction and discharge chambers. The casing parts described may be madeby one single casting, if desired.

The chambers above the deck 15 are shown as closed by a dome 20, whichhas a transverse partition 21, registering with the partition 16, thisdome being held in place by a nut 31, screwing onto a stud 30, which isthreaded at its lower end into a boss formed on the partition 16. Thepartition 21 is centrally enlarged to slidably embrace the stud 30. Thedome is held in air-tight connection with the casing 10 by the nut 31, asuitable gasket 32 being interposed between the meeting faces of thedome and casing.

The suction pipe 40 connects with the suction side of the casing, beingshown as threaded into a boss 1'? thereon, while the discharge pipe 41is shown as threaded into a similar boss 18 on the opposite side of thecasing.

Within the cylinder 11 is shown a suitable piston 50 on an operatingpiston rod 51, extending out through a stuffing box 52 mounted on a head53, secured to the casing 10 opposite that end of the cylinder. The samebolts, indicated at 54, securing the head to the'casing may also secureboth parts to a suitable frame 55 for the piston rod operatingmechanism, not shown. A suitable plug 57 may close an opening in thecasing 10, opposite the other end of the cylinder.

With the construction above described, if the 5 piston 50 is moved byits rod, toward the left in Fig. 3, for instance, suction is establishedfrom the suction pipe 40 through one of the suction valves S, andpassageway 12 to the right-hand end of the cylinder, while the liquidunder presn valve D appertaining to that end of the cylinder,

and thence to the discharge pipe 42. On the opposite stroke, the liquidenters through the other suction valve S, which is associated with theleft-hand end of the cylinder, and the discharge is efiected through theother discharge valve D, associated with the right-hand end.

Double-acting reciprocating pumps having an open ended cylinder and fourvalves operating in general as described are well known. Frequently twoof the valves have been placed below the cylinder. and two above, butwith my valves I prefer to arrange them all above the cylinder on onehorizontal deck 15, as that enables more ready installation and removalof the valves, as herein! after described.

It is, of course, necessary that the suction valves open toward thecylinder, and the discharge valves away from the cylinder. It isdesirable that the seats for these valves be removable so that they maybe replaced from time to time. It is also desirable that as simple ameans as practicable be provided for holding the removable seats inplace and for guiding the valves to insure their proper seating. Iaccomplish all of thisby providing the peculiar seat and valvearrangement illustrated in Figs. 1, 4 and 5, which I will now describe.

The valve seat, whether for the discharge valve or the suction valvecomprises a disc 60, having a central orifice and a number of holes 61,spaced about the central orifice. This seat rests in a rabbet formed inthe upper face of the diaphragm 15 and is held in place by engagementwith it of a shoulder on a stud 70, which passes through the centralorifice, and has its lower end 71 threaded into a tapped opening in thebase portion of the casing 10. The lower portion of the stud 70 from thethreaded end 71 to the top of the valve seat is of one diameter, whileabove the valve seat it has an increased diameter 72, extending axiallyfor a considerable distance, and at the upper end of this increaseddiameter is a head 73, with a screw-driver slot 74. By means of thisslot the stud, which has been passed through the valve seat, may bereadily screwed into place when the dome 20 of the suction and dischargechambers is removed. Thus the valve seat is effectively clamped in fixedposition. This is a much simpler means for holding the valve seat thanby forming a thread on its periphery and it enables a more ready removalof the seat.

The stud 70 provides also the means for guiding the valve 80, which is adisc of diameter surficient to cover the seat openings 61 and providedwith a central opening by which it may be slidably mounted on the stud.In the case of the discharge valve, its central opening is large enoughso that it embraces the enlarged diameter 72 of the stud, and this valveis held down to its seat by a spring 90, compressed between the valveand the studhead 73. The suction valve which is similar to the dischargevalve, slidably surrounds the reduced diameter of the stud 70, and isheld up against its seat by a similar spring 90, compressed between thevalve and a nut 95 threaded on the stud 71.

It will be seen that the seats for the suction valves and the dischargevalves are identical; the studs which clamp these seats and form theguides for the valves are identical, and the seating springs areidentical. Indeed, all of the valves may be exactly alike, as a largerbore in the suction valves than would snugly embrace the reduced studdiameter does no harm. The construction, therefore, not only providesfor economical manufacture and assemblage, but for ready interchange ofall of the parts.

The removal of the dome 20 allows access to all of the valves, and theremoval of the studs removes both the valves and their-seats, enablingreplacement with the greatest convenience. Moreover, either side of thecasing may be coupled with a suction pipe and either side with adischarge pipe, and the valves placed accordingly. This is a greatconvenience in installation, as it enables the user to mount his pump asmay be most satisfactory with reference to his suction and dischargepiping. I

I have shown the dome 20 provided with a priming opening normally closedby a plug 100, which is intended to allow communication to the suctionside of the pump. As the dome is reversible, it is changed to associatethe priming opening with the other side of the casing whenever suchother side carries the suction valves. The drawing also indicatessuitable plugged openings for draining purposes, attaching pressuregages, etc.

It will be seen that my construction of valve is very simple andinexpensive; that the parts may be interchangeable, and that by thearrangement of the casing with the pump-chamber wall below the valveseats and with the removable cover above the seats, the valves may bevery readily mounted and removed for replacement.

I claim:

1. In a pump, the combination with a pump chamber and a deck having twoopenings through it, a valve seat for a suction valve extending acrossone opening, a valve seat for a discharge valve extending across theother opening, a. pairof like studs extending through the respectivevalve seats and threaded into the wall of the pump chamber, each studhaving a shoulder whereby the stud may clamp the valve seat in place, avalve slidably mounted on the stud beneath one of the seats, a springbeneath said valve tending to raise it against such seat, a valveslidably mounted on the other stud above the valve seat, and a springcompressed against that valve tending to lower it to its seat.

2. In a pump frame having a chamber dividing plate with a hole therein,a removable valve mechanism comprising a valve seat retained over saidhole by a stud, said stud piercing said valve seat and having a shouldercooperating with said valve seat and said stud being threadingly engagedin said pump frame on the underside of said plate to retain said valveseat as aforementioned, together with a valve slidingly retained on saidstud on the underside of said valve seat and a. coil spring surroundingsaid guideway and bearing at one end against said valve and at the otheragainst a retaining means removably mounted on said stud.

3. A valve assembly for mounting in a pump comprising a stud havingportions of two different diameters, a valve seat surrounding theportion of less diameter and adapted to bear on the shoulder of the studat the junction of the different diameters, a valve on the other side ofthe valve and spring below it may be secured in the pump by screwing thestud into a receiving open- 8 in the pump.

4. In a pump, the combination of a suction chamber, a piston andcylinder beneath the same, a passageway from the suction chamber to thecylinder including an opening through a supporting deck, a valve seatresting on an upper surface of the deck, a valve below the valve seat, aspring below the valve tending to press the same upwardly against theseat, and a stud passing through the valve seat and screwing at itslower end into the pump frame, said stud having a shoulder to hold theseat down on the deck while the portion of the stud below the seat formsa guide for the valve acting against the underside of the seat.

5. The combination of a pump casing providing a pump chamber and a deckabove it, with openings through it, two like valve seats on the upperside of the deck, occupying rabbets at the edges of the deck openings,two like studs passing through the seats and anchored to the wall of thepump chamber below the seats, each stud having a shoulder engaging aseat to hold it in place and having guiding surfaces above the seat andbelow the seat, one stud having a sliding valve on the guiding surfaceabove its respective seat, coacting with the seat, and a sliding valveon the other stud on its guiding surface below the seat coacting withthe under side of its respective seat. 6. In a pump, the combinationwith a cylinder and piston and a valve deck of a suction valve unit anda discharge valve unit, each valve unit comprising a seat in the form ofa disc with an opening through it, a valve disc adapted to close theopenings, and a stud performing the double function of holding the valveseat in place on the deck and guiding the valve, the seats, valves andstuds being respectively alike in the different units the seats being onthe same side of the deck and one valve being on one side of its seatand on the upper side of said deck and the other valve being on theopposite side of said deck and hearing against the bottom of itsrespective seat.

WALTER A. SHALLENBERG.

